触摸板之前在我的 Thinkpad 上运行良好。从未出现过问题。
由于某种原因，它已停止工作。
不确定问题是什么，日志控制没有显示问题，我尝试通过以下方式重新启动并安装旧驱动程序：sudo apt install xserver-xorg-input-synaptics
然后我重新启动了。
遗憾的是它没有解决任何问题。
$ journalctl -kf
-- Logs begin at Thu 2019-01-31 23:27:56 CST. --
Feb 10 10:45:34 reinhard-T480 kernel: CPU4: Core temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU0: Package temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU4: Package temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU5: Package temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU7: Package temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU6: Package temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU3: Package temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU1: Package temperature/speed normal
Feb 10 10:45:34 reinhard-T480 kernel: CPU2: Package temperature/speed normal
Feb 10 11:24:15 reinhard-T480 kernel: perf: interrupt took too long (3954 > 3938), lowering kernel.perf_event_max_sample_rate to 50500
$ sudo dmidecode -t system | grep Version && sudo dmidecode -t system | grep SKU
Version: ThinkPad T480
SKU Number: LENOVO_MT_20L6_BU_Think_FM_ThinkPad T480
$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Raydium Corporation Raydium Touch System id=9 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=13 [slave pointer (2)]
⎜ ↳ TPPS/2 IBM TrackPoint id=14 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Sleep Button id=8 [slave keyboard (3)]
↳ Integrated IR Camera: Integrate id=10 [slave keyboard (3)]
↳ Integrated Camera: Integrated C id=11 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
↳ ThinkPad Extra Buttons id=15 [slave keyboard (3)]
$
